package org.example.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

/**
 * @author xuan
 * @create 2023/9/18
 *
 * TextWebSocketFrame这个类型表示的是一个文本帧
 */
public class MyTestWebSocketFrameHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {
    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器端收到消息：" + msg.text());

        //回复消息
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器时间：" + LocalDateTime.now() +"，回复内容：" + msg.text()));
    }

    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        //id表示唯一的值，LongText是唯一的，而ShortText不是唯一的
        System.out.println("handlerAdded被调用了：" + ctx.channel().id().asLongText());
        System.out.println("handlerAdded被调用了：" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved被调用了：" + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("异常发生：" + cause.getMessage());
        ctx.close();
    }
}





















